diff options
| -rw-r--r-- | Help/manual/cmake-variables.7.rst | 2 | ||||
| -rw-r--r-- | Help/variable/CMAKE_CXX_COMPILE_FEATURES.rst | 8 | ||||
| -rw-r--r-- | Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst | 8 | ||||
| -rw-r--r-- | Modules/CMakeCXXCompiler.cmake.in | 3 | ||||
| -rw-r--r-- | Modules/CMakeDetermineCompileFeatures.cmake | 43 | ||||
| -rw-r--r-- | Modules/CMakeTestCXXCompiler.cmake | 3 | ||||
| -rw-r--r-- | Modules/Internal/FeatureTesting.cmake | 57 |
7 files changed, 124 insertions, 0 deletions
diff --git a/Help/manual/cmake-variables.7.rst b/Help/manual/cmake-variables.7.rst index 62a7cce..dfdd09b 100644 --- a/Help/manual/cmake-variables.7.rst +++ b/Help/manual/cmake-variables.7.rst @@ -257,6 +257,8 @@ Variables for Languages :maxdepth: 1 /variable/CMAKE_COMPILER_IS_GNULANG + /variable/CMAKE_CXX_COMPILE_FEATURES + /variable/CMAKE_CXX_KNOWN_FEATURES /variable/CMAKE_CXX_STANDARD /variable/CMAKE_CXX_EXTENSIONS /variable/CMAKE_Fortran_MODDIR_DEFAULT diff --git a/Help/variable/CMAKE_CXX_COMPILE_FEATURES.rst b/Help/variable/CMAKE_CXX_COMPILE_FEATURES.rst new file mode 100644 index 0000000..6be0124 --- /dev/null +++ b/Help/variable/CMAKE_CXX_COMPILE_FEATURES.rst @@ -0,0 +1,8 @@ +CMAKE_CXX_COMPILE_FEATURES +-------------------------- + +List of features known to the C++ compiler + +These features are known to be available for use with the C++ compiler. This +list is a subset of the features listed in the :variable:`CMAKE_CXX_KNOWN_FEATURES` +variable. diff --git a/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst b/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst new file mode 100644 index 0000000..7466d44 --- /dev/null +++ b/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst @@ -0,0 +1,8 @@ +CMAKE_CXX_KNOWN_FEATURES +------------------------ + +List of C++ features known to this version of CMake. + +The features listed in this variable may be known to be available to the +C++ compiler. If the feature is available with the C++ compiler, it will +be listed in the :variable:`CMAKE_CXX_COMPILE_FEATURES` variable. diff --git a/Modules/CMakeCXXCompiler.cmake.in b/Modules/CMakeCXXCompiler.cmake.in index c75611a..fdee336 100644 --- a/Modules/CMakeCXXCompiler.cmake.in +++ b/Modules/CMakeCXXCompiler.cmake.in @@ -2,6 +2,9 @@ set(CMAKE_CXX_COMPILER "@CMAKE_CXX_COMPILER@") set(CMAKE_CXX_COMPILER_ARG1 "@CMAKE_CXX_COMPILER_ARG1@") set(CMAKE_CXX_COMPILER_ID "@CMAKE_CXX_COMPILER_ID@") set(CMAKE_CXX_COMPILER_VERSION "@CMAKE_CXX_COMPILER_VERSION@") +set(CMAKE_CXX_COMPILE_FEATURES "@CMAKE_CXX_COMPILE_FEATURES@") +set(CMAKE_CXX11_COMPILE_FEATURES "@CMAKE_CXX11_COMPILE_FEATURES@") + set(CMAKE_CXX_PLATFORM_ID "@CMAKE_CXX_PLATFORM_ID@") set(CMAKE_CXX_SIMULATE_ID "@CMAKE_CXX_SIMULATE_ID@") set(CMAKE_CXX_SIMULATE_VERSION "@CMAKE_CXX_SIMULATE_VERSION@") diff --git a/Modules/CMakeDetermineCompileFeatures.cmake b/Modules/CMakeDetermineCompileFeatures.cmake new file mode 100644 index 0000000..40aa9d6 --- /dev/null +++ b/Modules/CMakeDetermineCompileFeatures.cmake @@ -0,0 +1,43 @@ + +#============================================================================= +# Copyright 2013 Stephen Kelly <steveire@gmail.com> +# +# Distributed under the OSI-approved BSD License (the "License"); +# see accompanying file Copyright.txt for details. +# +# This software is distributed WITHOUT ANY WARRANTY; without even the +# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +# See the License for more information. +#============================================================================= +# (To distribute this file outside of CMake, substitute the full +# License text for the above reference.) + +function(cmake_determine_compile_features lang) + + if(lang STREQUAL CXX AND COMMAND cmake_record_cxx_compile_features) + message(STATUS "Detecting ${lang} compile features") + + set(CMAKE_CXX11_COMPILE_FEATURES) + + include("${CMAKE_ROOT}/Modules/Internal/FeatureTesting.cmake") + + cmake_record_cxx_compile_features() + + if(NOT _result EQUAL 0) + message(STATUS "Detecting ${lang} compile features - failed") + return() + endif() + + if(NOT CMAKE_CXX_COMPILE_FEATURES) + set(CMAKE_CXX_COMPILE_FEATURES + ${CMAKE_CXX11_COMPILE_FEATURES} + ) + endif() + + set(CMAKE_CXX_COMPILE_FEATURES ${CMAKE_CXX_COMPILE_FEATURES} PARENT_SCOPE) + set(CMAKE_CXX11_COMPILE_FEATURES ${CMAKE_CXX11_COMPILE_FEATURES} PARENT_SCOPE) + + message(STATUS "Detecting ${lang} compile features - done") + endif() + +endfunction() diff --git a/Modules/CMakeTestCXXCompiler.cmake b/Modules/CMakeTestCXXCompiler.cmake index a06c92a..81561b2 100644 --- a/Modules/CMakeTestCXXCompiler.cmake +++ b/Modules/CMakeTestCXXCompiler.cmake @@ -66,6 +66,9 @@ else() # Try to identify the ABI and configure it into CMakeCXXCompiler.cmake include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake) CMAKE_DETERMINE_COMPILER_ABI(CXX ${CMAKE_ROOT}/Modules/CMakeCXXCompilerABI.cpp) + # Try to identify the compiler features + include(${CMAKE_ROOT}/Modules/CMakeDetermineCompileFeatures.cmake) + CMAKE_DETERMINE_COMPILE_FEATURES(CXX) # Re-configure to save learned information. configure_file( diff --git a/Modules/Internal/FeatureTesting.cmake b/Modules/Internal/FeatureTesting.cmake new file mode 100644 index 0000000..92d262c --- /dev/null +++ b/Modules/Internal/FeatureTesting.cmake @@ -0,0 +1,57 @@ + +macro(record_compiler_features lang compile_flags feature_list) + include("${CMAKE_ROOT}/Modules/Compiler/${CMAKE_${lang}_COMPILER_ID}-${lang}-FeatureTests.cmake" OPTIONAL) + + string(TOLOWER ${lang} lang_lc) + file(REMOVE "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin") + file(WRITE "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}" " + extern const char features[] = {\"\"\n") + foreach(feature ${CMAKE_${lang}_KNOWN_FEATURES}) + if (_cmake_feature_test_${feature}) + if (${_cmake_feature_test_${feature}} STREQUAL 1) + set(_feature_condition "\"1\" ") + else() + set(_feature_condition "#if ${_cmake_feature_test_${feature}}\n\"1\"\n#else\n\"0\"\n#endif\n") + endif() + file(APPEND "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}" "\"${lang}_FEATURE:\"\n${_feature_condition}\"${feature}\\n\"\n") + endif() + endforeach() + file(APPEND "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}" + "\n};\n\nint main(int, char **) { return 0; }\n") + + try_compile(CMAKE_${lang}_FEATURE_TEST + ${CMAKE_BINARY_DIR} "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}" + COMPILE_DEFINITIONS "${compile_flags}" + OUTPUT_VARIABLE _output + COPY_FILE "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin" + COPY_FILE_ERROR _copy_error + ) + if(CMAKE_${lang}_FEATURE_TEST AND NOT _copy_error) + set(_result 0) + else() + set(_result 255) + endif() + unset(CMAKE_${lang}_FEATURE_TEST CACHE) + + if (_result EQUAL 0) + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log + "\n\nDetecting ${lang} [${compile_flags}] compiler features compiled with the following output:\n${_output}\n\n") + if(EXISTS "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin") + file(STRINGS "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin" + features REGEX "${lang}_FEATURE:.*") + foreach(info ${features}) + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log + " Feature record: ${info}\n") + string(REPLACE "${lang}_FEATURE:" "" info ${info}) + string(SUBSTRING ${info} 0 1 has_feature) + if(has_feature) + string(REGEX REPLACE "^1" "" feature ${info}) + list(APPEND ${feature_list} ${feature}) + endif() + endforeach() + endif() + else() + file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log + "Detecting ${lang} [${compile_flags}] compiler features failed to compile with the following output:\n${_output}\n${_copy_error}\n\n") + endif() +endmacro() |